However, I have birdie that comes up on the low end of the panadapter and travels to the high end. Of course, I only hear it as it passes the frequency that I am tuned to and it's a high pitched sweeping sound. I can see it on the waterfall after it has traveled the panadapter, at the bottom of the waterfall as a black "bump" in going left to right.
What kind of noise source should I be looking for? I have a small RF detector but there are so many places around the house to check.
Survey your whole house, look for those little wall warts that charge this and that or power whatever. Unplug them all and then see if you still have the noise. If so, it could be coming from a neighbor!
Good luck, you'll need it.
73, Dave KD5FX
The good news is that it isn't much of a nuisance. Their presence only lasts on a particular frequency for milliseconds. As I was working the contest this weekend, I kept watching them travel up the band and thought it was one more thing I could eliminate.
I do have the chargers for my iPhone, iPad, and various other battery devices in my shack. I will be playing process of elimination with those to see if it makes any difference at all on my noise level.
I have a noise source that repeats every 70 kHz from about 3 MHz up to 36 MHz. It is about 20 kHz wide and drift is very slow. There is no audio associated with it regardless of which mode I listen in or try a BFO. What it does I raise the noise floor by 15 to 20 dB. It doesn't seem to "interfere" with signals but weak signals which fall on those frequencies are buried much deeper down in the noise. The project for this week is to use the Pixel PRO-1b to try to DF it. Hopefully, it will be on a friendly property. Has anyone identified a signal with this kind of profile?
I have also seen a signal as described earlier that scans from low to high frequencies on all bands. I have also seen a signal that scans from high to mid frequency on 10 Meters. It is strong enough to be an annoyance in a qso.
The panadapter has really opened my eyes to just how much noise and crud there is out there on HF frequencies. I have a suspicion that some of the noise is related to the use of grow lamps, and I want to track those down. My ICOM IC-737 shows an S9 noise level on 40 meters and S5 on the 6700 which makes 40 Meters impossible for qso's with weak signals. 20 Meters is slightly better, but still weak signals are impossible to hear.